نتایج جستجو برای: dune sand

تعداد نتایج: 29993  

Journal: :Remote Sensing 2009
Abdulali Sadiq Fares Howari

Remote sensing data can provide valuable information about the surface expression of regional geomorphologic and geological features of arid regions. In the present study, several processing techniques were applied to reveal such in the Qatar Peninsula. Those included preprocessing for radiometric and geometric correction, various enhancement methods, classification, accuracy assessment, contra...

2003
Haim Tsoar Eugene Berman

Most aeolian sediment transport models and experiments have been conducted on flat horizontal surfaces. Very little numerical or analytical research has been carried out for aeolian sand transport on slopes. The current work presents numerical modelling of saltating sand for a climbing dune which has a slope angle of 20”. The model utilised wind fields predicted from the FAA complex terrain mod...

Journal: :Physical review letters 2006
Orencio Durán Hans J Herrmann

Vegetation is the most common and most reliable stabilizer of loose soil or sand. This ancient technique is for the first time cast into a set of equations of motion describing the competition between aeolian sand transport and vegetation growth. Our set of equations is then applied to study quantitatively the transition between barchans and parabolic dunes driven by the dimensionless fixation ...

Arash Amini, Gholamreza Mirab Shabestari, Mahboobeh Vosoo,

Babolsar eastern coastal dunes have been developed along the southern coast of the Caspian Sea. The studied area is coordinated in N36°43' to N36°44' latitude and E52°44' to E52°52' longitude. The objectives of this research were to: Study mineralogy and geochemistry of sand dunes, to obtain chemical alteration index (CIA) and its relationship to climate and mineralogy, to de...

باغبانان, علیرضا, رازانی, مهدی, رمضانیفر, فرشاد, هاشم الحسینی, حمید,

Archaeological sites in desert areas are at risk for destroying and reburied with sand dunes by sand storms. One of the most important issues for archaeologist and conservators in these regions are maintenance of archaeological remains, during the excavation process and after it, There are several sand dune stabilization methods such as mechanical dune stabilization, mulch or protective screen,...

Badv, Kazem, Soltani Jigheh, Hossein, Barin, Mohsen, Douzali Joushin, Farzaneh,

Introduction The geotechnical engineering problems involving unsaturated soils are included water flow, shear strength and volume change. Soil-water characteristic curve (SWCC) describes the constitutive relationship between soil suction and soil water content. SWCC may be determined directly or indirectly in the laboratory. Because of the various difficulties involved in the direct measuremen...

Journal: :Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 2010

Journal: :Journal of Geophysical Research: Earth Surface 2016

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